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/home/ntakagi/work/STLport-5.1.5/stlport/stl/_function_base.h Go to the documentation of this file. /* * * Copyright (c) 1994 * Hewlett-Packard Company * * Copyright (c) 1996-1998 * Silicon Graphics Computer Systems, Inc. * * Copyright (c) 1997 * Moscow Center for SPARC Technology * * Copyright (c) 1999 * Boris Fomitchev * * This material is provided "as is", with absolutely no warranty expressed * or implied. Any use is at your own risk. * * Permission to use or copy this software for any purpose is hereby granted * without fee, provided the above notices are retained on all copies. * Permission to modify the code and to distribute modified code is granted, * provided the above notices are retained, and a notice that the code was * modified is included with the above copyright notice. * */ /* NOTE: This is an internal header file, included by other STL headers. * You should not attempt to use it directly. */ #ifndef _STLP_INTERNAL_FUNCTION_BASE_H #define _STLP_INTERNAL_FUNCTION_BASE_H #if defined (_STLP_CLASS_PARTIAL_SPECIALIZATION) && !defined (_STLP_TYPE_TRAITS_H) # include <stl/type_traits.h> #endif _STLP_BEGIN_NAMESPACE template <class _Arg, class _Result> struct unary_function { typedef _Arg argument_type; typedef _Result result_type; }; template <class _Arg1, class _Arg2, class _Result> struct binary_function { typedef _Arg1 first_argument_type; typedef _Arg2 second_argument_type; typedef _Result result_type; }; template <class _Tp> struct equal_to : public binary_function<_Tp, _Tp, bool> { bool operator()(const _Tp& __x, const _Tp& __y) const { return __x == __y; } }; template <class _Tp> struct less : public binary_function<_Tp,_Tp,bool> #if defined (_STLP_CLASS_PARTIAL_SPECIALIZATION) /* less is the default template parameter for many STL containers, to fully use * the move constructor feature we need to know that the default less is just a * functor. */ , public __stlport_class<less<_Tp> > #endif { bool operator()(const _Tp& __x, const _Tp& __y) const { return __x < __y; } #if defined (_STLP_CLASS_PARTIAL_SPECIALIZATION) && defined (_STLP_USE_PARTIAL_SPEC_WORKAROUND) //This is for a very special compiler config: partial template specialization //but no template function partial ordering. void swap(less<_Tp>&) {} #endif }; #if defined (_STLP_CLASS_PARTIAL_SPECIALIZATION) template <class _Tp> struct __type_traits<less<_Tp> > { #if !defined (__BORLANDC__) typedef typename _IsSTLportClass<less<_Tp> >::_Ret _STLportLess; #else enum { _Is = _IsSTLportClass<less<_Tp> >::_Is }; typedef typename __bool2type<_Is>::_Ret _STLportLess; #endif typedef _STLportLess has_trivial_default_constructor; typedef _STLportLess has_trivial_copy_constructor; typedef _STLportLess has_trivial_assignment_operator; typedef _STLportLess has_trivial_destructor; typedef _STLportLess is_POD_type; }; #endif _STLP_MOVE_TO_PRIV_NAMESPACE template <class _Tp> less<_Tp> __less(_Tp* ) { return less<_Tp>(); } template <class _Tp> equal_to<_Tp> __equal_to(_Tp* ) { return equal_to<_Tp>(); } _STLP_MOVE_TO_STD_NAMESPACE template <class _Tp> struct plus : public binary_function<_Tp, _Tp, _Tp> { _Tp operator()(const _Tp& __x, const _Tp& __y) const { return __x + __y; } }; template <class _Tp> struct minus : public binary_function<_Tp, _Tp, _Tp> { _Tp operator()(const _Tp& __x, const _Tp& __y) const { return __x - __y; } }; _STLP_MOVE_TO_PRIV_NAMESPACE template <class _Tp> plus<_Tp> __plus(_Tp* ) { return plus<_Tp>(); } template <class _Tp> minus<_Tp> __minus(_Tp* ) { return minus<_Tp>(); } _STLP_MOVE_TO_STD_NAMESPACE template <class _Tp> struct multiplies : public binary_function<_Tp, _Tp, _Tp> { _Tp operator()(const _Tp& __x, const _Tp& __y) const { return __x * __y; } }; _STLP_MOVE_TO_PRIV_NAMESPACE template <class _Pair> struct _Select1st : public unary_function<_Pair, typename _Pair::first_type> { const typename _Pair::first_type& operator()(const _Pair& __x) const { return __x.first; } }; template <class _Pair> struct _Select2nd : public unary_function<_Pair, typename _Pair::second_type> { const typename _Pair::second_type& operator()(const _Pair& __x) const { return __x.second; } }; // project1st and project2nd are extensions: they are not part of the standard template <class _Arg1, class _Arg2> struct _Project1st : public binary_function<_Arg1, _Arg2, _Arg1> { _Arg1 operator()(const _Arg1& __x, const _Arg2&) const { return __x; } }; template <class _Arg1, class _Arg2> struct _Project2nd : public binary_function<_Arg1, _Arg2, _Arg2> { _Arg2 operator()(const _Arg1&, const _Arg2& __y) const { return __y; } }; #if defined (_STLP_MULTI_CONST_TEMPLATE_ARG_BUG) // fbp : sort of select1st just for maps template <class _Pair, class _Whatever> // JDJ (CW Pro1 doesn't like const when first_type is also const) struct __Select1st_hint : public unary_function<_Pair, _Whatever> { const _Whatever& operator () (const _Pair& __x) const { return __x.first; } }; # define _STLP_SELECT1ST(__x,__y) _STLP_PRIV __Select1st_hint< __x, __y > #else # define _STLP_SELECT1ST(__x, __y) _STLP_PRIV _Select1st< __x > #endif template <class _Tp> struct _Identity : public unary_function<_Tp,_Tp> { const _Tp& operator()(const _Tp& __x) const { return __x; } }; template <class _Result, class _Argument> struct _Constant_unary_fun { typedef _Argument argument_type; typedef _Result result_type; result_type _M_val; _Constant_unary_fun(const result_type& __v) : _M_val(__v) {} const result_type& operator()(const _Argument&) const { return _M_val; } }; template <class _Result, class _Arg1, class _Arg2> struct _Constant_binary_fun { typedef _Arg1 first_argument_type; typedef _Arg2 second_argument_type; typedef _Result result_type; _Result _M_val; _Constant_binary_fun(const _Result& __v) : _M_val(__v) {} const result_type& operator()(const _Arg1&, const _Arg2&) const { return _M_val; } }; // identity_element (not part of the C++ standard). template <class _Tp> inline _Tp __identity_element(plus<_Tp>) { return _Tp(0); } template <class _Tp> inline _Tp __identity_element(multiplies<_Tp>) { return _Tp(1); } _STLP_MOVE_TO_STD_NAMESPACE _STLP_END_NAMESPACE #endif /* _STLP_INTERNAL_FUNCTION_BASE_H */ // Local Variables: // mode:C++ // End:

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